It depends, what are your stats? configs? I think a transaction should not have more than 1k objects. So, would be important to create a way to send batches of 1k instead of a giant one. Or you can use Bulkload instead.
BTW, if you use Ludicrous mode, I think there’s no limit there. You can literally send 400k objects in the same batch. But it depends on the resources you have and the config you have setup.